MyComponent.js

// http://facebook.github.io/react/blog/2015/10/07/react-v0.14.html#stateless-functional-components
// Simpler Components - Stateless Functional Components

var MyComponent = function(dataOk) {
  return(
    <div className="ok">{dataOk}</div>
  )
}

// ES6 Version

var MyComponent = ({dataOk}) => {
  return(
    <div className="component">{dataOk}</div>
  )
}

// Or if your never going to fuck with arguments

var MyComponent = ({dataOk}) => (
  <div className="component">{dataOk}</div>
)

// If you want to pass functions into Simple Components go for it!
// const onClick = () => console.log('clicked!');
  
var MyComponent = ({dataOk}) => (
  <div className="component">{dataOk}</div>
)

// Returns
// $$typeof: Symbol(react.element)
// _owner: null
// _self: null
// _source: null
// _store: Object
// key: null
// props: Object
// ref: null
// type: "div"